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频率利用率     
相关语句
  frequency efficiency
     How to Improve the Frequency Efficiency of GSM
     如何提高GSM网络的频率利用率
短句来源
     Optical Code Division Multiple Access(OCDMA)technology possess the characteristics of combating interference, high frequency efficiency, security, and simply network protocol, random access, so it is competitive to apply OCDMA to wireless optical access network.
     光码分多址(OCDMA)技术具有的抗干扰能力强、频率利用率高、保密性好、网络协议简单、支持随机接入等优点,将其应用到无线光接入网中,不仅具有CDMA技术的优点又保持了无线光通信的优点,实现二者优势互补。
短句来源
     Theoretic analysis and simulation results demonstrate that the algorithm is effective and can increase frequency efficiency dramatically.
     理论分析和仿真结果表明该算法是有效的,可以进一步提高频率利用率
短句来源
     This paper introduced some new technologies to increase the frequency efficiency in GSM network. Mobile communication operator can deploy appropriate technologies based on practical situation and capability of the provider.
     本文介绍了用于GSM网提高频率利用率的一些新技术,运营者可根据本地的实际情况与供货厂商的支持能力选择适当的技术
短句来源
  frequency utilization ratio
     Conventional CDMA's system always have low frequency utilization ratio which is thanks to multi-access interference.
     传统的CDMA系统由于存在多址干扰问题,严重影响其频率利用率
短句来源
  frequency utilizing rate
     it discusses issues on wireless communication frequency band selection and frequency configuration in fast track traffic,introduces a method of improving frequency utilizing rate by the aid of wireless frequency management program.
     探讨了城市快速轨道交通中无线通信频段的选择及频率配置问题,介绍了一种用无线电频率管理程序提高频率利用率的方法。
短句来源
     It is important for GSM network construction to improve frequency utilizing rate.
     GSM网络建设中,如何提高频率利用率对网络建设具有重要的意义。
短句来源
  “频率利用率”译为未确定词的双语例句
     The advantages of DS/CDMA communication system are increased capacity、soft capacity、soft handover、higher spectral efficiency and the ability to resist the effects of multi-path fading, and so on.
     DS/CDMA通信系统由于具有容量大、软容量、软切换、频率利用率高、抗多径衰落能力强等优点,己得到广泛应用。
短句来源
     The advantages of CDMA communication system in 3G are large capacity, soft capacity, soft handover, higher spectral efficiency and the ability to resist the effects of multi-path fading, and so on.
     CDMA通信系统由于具有容量大、软容量、软切换、频率利用率高、抗多径衰落能力强等优点而在第三代移动通信系统(3G)中得到广泛应用。
短句来源
     Thanks to the TETRA system' s rich service functions, higher efficiency in frequency use, high communications quality and flexible network modes, many new applications (such as vehicle positioning, image transmission, mobile Internet, database inquiry, etc.) can be made possible in the TETRA system.
     由于TETRA数字集群系统具有丰富的服务功能、更高的频率利用率、高通信质量、灵活的组网方式,许多新的应用,如车辆定位、图像传输、移动互联网、数据库查询等都可以在TETRA中得到实现。
短句来源
     Enhancing frequency management and electromagnetic compatibility analysis, improving the utility ratio of frequency, avoiding producing harmful interfere, and increasing the development of social economy have become the urgent tasks that need to be solved by the radio management department.
     频率管理和指配是技术措施的重要步骤,加强频率规划和电磁兼容性分析,提高频率利用率,避免产生有害干扰,促进社会经济的发展,成为了当前无线电管理部门迫切需要解决的问题。
短句来源
     Those destroy the orthogonality of each channel which reduces the utility of frequency-spectrum in TD-SCDMA system .
     这些干扰破坏了各信道的正交性,降低了CDMA系统的频率利用率
短句来源
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  frequency efficiency
The simulation shows that the algorithm brings about fewer channel estimation errors while the frequency efficiency can be increased.
      
However, DC powers obtained in that way cannot be simply added in order to find a multi-frequency efficiency, since the process is nonlinear.
      
To allow optimal trade off between network topology and frequency efficiency, a flexible guard interval is specified.
      


In this paper, a design of multichannel digital command dialling system controlle by a MCS-51 single-chip microcomputer without centrel station (i.e. DCL system) in mobile radio communication is introduced. In this system, the common use of multichannel is realized by a search for a free channel. The efficienty of channel is greatly increased. The number of channel is also increased. Comparing of a DCL system with a old one, the DCL system can contain more users in a communication network in the same percent...

In this paper, a design of multichannel digital command dialling system controlle by a MCS-51 single-chip microcomputer without centrel station (i.e. DCL system) in mobile radio communication is introduced. In this system, the common use of multichannel is realized by a search for a free channel. The efficienty of channel is greatly increased. The number of channel is also increased. Comparing of a DCL system with a old one, the DCL system can contain more users in a communication network in the same percent of call lost. The resource of radio frequency can be utillized efficiently and reasonably. In this system, the hardware is simple but soffware is multifunctional. So the reliability of the system is higher and the system is good practice. This system can be used in 150 MHz, 400 MHz and 900 MHz etc. radio with digital freqency synthesizer. This system was suceeded in JZD 150 MHz radio made in yunnan Radio Factory.

本文介绍了采用MCS-51系列单片机——8031做为控制单元,实现移动电台的多信道、数字信令式无中心台拨号系统的原理与设计。此系统采用扫描空闲信道方式,实现了信道复用,有效地提高了频率利用率,并扩展了原电台的信道数。在相同的呼损率下,通信网内可容纳更多的用户。可望缓解频率资源日趋紧张的局面。此系统具有硬件简单,软件功能强的特点,从而提高了系统的可靠性与实用性。此系统适用于150MHz,400MHz,900MHz等带数字频率合成器的电台组成通信网。

With the rapid growing of mobile communication, the conflict between the demand of increasing subscribers and the limitation of the frequency resource is turning acute.Therefore how to efficiently improve the utilization of the frequency is a key problem in the development of this business.The paper introduces how to further improve frequency utilization in the channel shared condition for the small area cellular system, as well through analysing and comparing various channel assignment methods recently proposed....

With the rapid growing of mobile communication, the conflict between the demand of increasing subscribers and the limitation of the frequency resource is turning acute.Therefore how to efficiently improve the utilization of the frequency is a key problem in the development of this business.The paper introduces how to further improve frequency utilization in the channel shared condition for the small area cellular system, as well through analysing and comparing various channel assignment methods recently proposed. The paper elucidates their respective features and application cases.

由于移动通信的迅速发展,使得大量增长的业务需求与有限的频率资源之间的矛盾日益突出,因此如何更有效地提高频率的利用率,已成为本行业发展的关键。本文主要是针对小区制蜂窝系统在信道共用的情况下,如何进一步提高信道利用率的问题进行了研究,并在对目前提出的各种信道分配方案分析和比较的前提下,阐明了各自的特点和适用范围。

The lated type of Dispatch Mobile Communication Systems——iDEN is presented in this article. It is the most advanced integrated digital enhanced network of mobile communication systems, develeped and producted by Motorola.

文章主要从iDEN产品的多址方式、调制、编码技术及其较高的频率利用率、优良的语音特性、多业务功能等方面概要地介绍了目前先进的综合数字增强同移动通信系统.接着对系统的功能特点、系统结构和手机进行介绍.最后,针对我国目前数字集群通信的现状建议多方联合建立公网运营机制的数字集群通信系统.

 
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